U.S. EPA Construction Inspection Training Course
Module 5: 2022 Construction General Permit (CGP)
Site Inspections
Site 2
This document is a text-based version of Module 5: Site 2 of the EPA Construction
Inspection Training Course. It is intended to be used in conjunction with the other
modules in the EPA Construction Inspection Training Course.
This training does not impose any new legally binding requirements on EPA, States, Tribes, territories, or the
regulated community, and does not confer legal rights or impose legal obligations upon any member of
the public. In the event of a conflict between this training and any statute, regulation, or permit, this
training would not be controlling.
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Table of Contents
Screen 1
Screen 2
Screen 3
Site 2, Area 1
Site 2, Area 2
Site 2, Area 3
Site 2, Area 4
Site 2, Area 5
Site 2, Area 6
Site 2, Area 7
Site 2, Area 8
Site 2, Area 9
Site 2, Area 10
Site 2, Area 11
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1. Screen 1
1.1. Visual Element
Start Training
United States
Environmental Protection
Agency
United States Environmental Protection Agency (U.S. EPA)
Construction Inspection Training Course
Module 5: 2022 Construction General Permit (CGP) Site Inspections
1.2. Narration
Welcome to Module 5: Conducting Construction General Permit Site Inspections, Site 2. When
you are ready, select the Start Training button to begin your second virtual site inspection.
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2. Screen 2
2.1. Visual Element
vvEPA
United Stales
Environmental Protection
Agency
2 of 32
Second Virtual Site Inspection
Site 2 Map
0
2.2. Narration
Before you start the inspection, select the link on the screen to open a copy of the Site 2 map.
You may find it useful to keep a copy of the site map open in another window throughout the
virtual inspection. To help you become familiar with the site, the next screen will present a brief
video showing the path you will travel through Site 2. Then, you will proceed to the first 360-
degree area. Let's hop in the truck and go!
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2.3. Links
Site 2 Map
Site 2 Map
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3. Screen 3
3.1. Visual Element
oEPA
United States
Environmental Protection
Agency
3 of 32
Key:
-
Silt Fence
FT-]
Site Entrance/Exit
Wash rack
(ID
Stockpile
Sediment Trap
Ś
Outlet Structure
_
Swale
Property Boundary
3.2. Narration
This is a map for the second virtual site. This map will be a handy tool that we will refer to
throughout the inspection. Watch the animation of the footprints to see the path you will follow.
You will walk north along the construction entrance and stop to inspect the first sediment trap on
your right. Then, you will walk further into the site to assess the condition of the stockpile. Finally,
you will walk along the swale and toward the second sediment trap on the western side of the
site, which also functions as the site's main discharge point. Select the next arrow to begin your
inspection at the site's construction entrance.
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4. Site 2, Area 1
4.1. Starting View
Figure 4-1. Starting view for Site 2, Area 1.
4.2. Opening Narration
Welcome to the second virtual construction site inspection. Compared to the first site, this one is
in a noticeably different phase of construction: much of the site is inactive and temporarily
stabilized. However, you are still required to conduct inspections. For the sake of time, you won't
walk the entire permitted area as you would normally do during a real inspection. Instead, this
virtual inspection will focus on different types of construction stormwater controls that you didn't
encounter at the previous site. Keep in mind that issues or potential issues observed during the
inspection must be noted as triggering either routine maintenance or a corrective action in your
inspection report. These will be pointed out throughout the inspection.
At this site, we'll be walking with a colleague. You will see him throughout our inspection. Before
you head into the site, take a moment to review the icons in this area.
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4.3. Site 2, Area 1 Interactive Icons
Figure 4-2. Composite view of interactive icons for Site 2, Area J.
Map Pin Icon
Figure 4-3. Site 2 Map. "You Are Here" in Area I.
Information Icon (Left!
This is construction material. You must look for potential stormwater pollution issues such as
uncovered materials, spills, or leaks. The material here appears fully covered in plastic and stored
on pallets.
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Image Icon
Figure 4-4. View of wash rack in the stabilized construction entrance.
Here is a wash rack at the site's stabilized construction entrance. You must check that the
controls are properly installed according to the construction plans and functioning as intended.
The stone aggregate used at this construction entrance appears to be smaller than the
intended design. In addition, the wash rack is overgrown with vegetation and does not extend
as long as designed. The wash rack likely cannot be used as intended to capture sediment
washed off from vehicle tires.
Document these issues in your inspection report. That being said, because the site is inactive and
mostly stabilized, this entrance is probably not frequently used and there isn't much sediment
track-out to be contained. In this kind of situation, it's important to talk to the operator as soon as
possible about what controls are necessary based on current activities and then decide
whether maintenance or a repair is needed. Remember, if the operator decides to change or
remove a control, they must update the project SWPPP and site map accordingly.
Information Icon (Right)
This is a sediment trap that you will inspect when you take the next step into the site.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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5. Site 2, Area 2
5.1. Starting View
Figure 5-1. Starting view for Site 2, Area 2.
5.2. Opening Narration
We just walked onto the western embankment of the sediment trap. At first glance, the
embankment of this sediment trap appears stable. Select the icons to learn more about how to
inspect a sediment trap.
5.3. Site 2, Area 2 Interactive Icons
Figure 5-2. Composite view of interactive icons for Site 2, Area 2.
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Mop Pin Icon
Figure 5-3. Site 2 Map. "You Area Here" in Area 2.
Informofion Icon
You must check the trap's embankments and outlet for erosion. You also need to check that the
trap is installed according to State, Tribal, Territorial, and local design specifications. There may
be specifications that require the trap to hold a certain volume or use specific outlet structures.
Image Icon (Left)
ŚŚ V Ś ' '
* ^
It
p
'
Figure 5-4. View of sediment trap full of turbid wafer.
When inspecting a sediment trap, you need to check that the operator is removing
accumulated sediment from the basin to maintain at least half of the trap's design capacity.
This sediment trap is full of turbid water; however, a large storm event passed through this area
last night, so this is not surprising and shows that the trap is working as designed by capturing and
slowly filtering the sediment laden stormwater.
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Image Icon (Right)
Figure 5-5. View of stone outlet on southern embankment of sediment trap.
It's difficult to see, but the outlet of the sediment trap is on this southern embankment. The outlet
is an overflow weir made of riprap that leads to a grassy swale downgradient of the trap. This
outlet is obscured by heavy vegetation that may obstruct the flow of stormwater. Removing the
overgrown vegetation is considered upkeep that ensures the stormwater control remains in
effective operating condition, therefore this work should be handled as routine maintenance as
opposed to a corrective action. Document this issue in your inspection report as needing routine
maintenance, and present this finding to the operator after the inspection so the operator can
begin maintenance immediately. You should walk around to the downgradient side of the
outlet to see if you can get a better view of the structure.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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6. Site 2, Area 3
6.1. Starting View
Figure 6-7. Starting view for Site 2, Area 3.
6.2. Opening Narration
We have walked around to the southern side of the sediment trap. Select the icon to check out
the outlet.
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6.3. Site 2, Area 3 Interactive Icons
Figure 6-2. View of interactive icons for Site 2, Area 3.
Map Pin Icon
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Image Icon
Figure 6-4. View from the downgradient side of the sediment trap's outlet.
We are standing next to the southern embankment of the sediment trap, on the downstream
side of the outlet. This provides a slightly better view of the overflow weir, but the structure is still
mostly obscured by vegetation. Because of the vegetation, it's difficult to check for evidence of
sediment leaving the sediment trap. Let's walk to the downgradient end of the swale and see if
there is any sediment leaving the trap.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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7. Site 2, Area 4
7.1. Starting View
Figure 7-1. Starting view for Site 2, Area 4.
7.2. Opening Narration
We have walked back to the western side of the sediment trap. Select the icons to inspect the
swale that is downgradient of the sediment trap's outlet. After, select the arrow icon to move
further into the site.
7.3. Site 2, Area 4 Interactive Icons
Figure 7-2. Composite view of interactive icons for Site 2, Area 4.
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Mop Pin Icon
Figure 7-3. Site 2 Map. "You Are Here" in Area 4.
Image Icon (Left)
Figure 7-4. View of the sediment trap's outlet and downstream swale.
This image was taken at the downgradient end of the swale, looking upgradient toward the
sediment trap's outlet, Because there is so much vegetation growing here, the image is
annotated to make clear the locations of the weir outlet and the swale. The segment of super silt
fence at the end of the swale filters any sediment leaving the trap.
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Image Icon (Right)
Figure 7-5. View of super silt fence downgradienf of the sediment trap outlet.
This is a close-up view of the segment of super silt fence that is downgradient of the sediment
trap outlet. This is where any sediment leaving the trap accumulates. The amount of sediment
currently accumulated against the fence is minimal and not a concern. However, you can see
that a corner of the silt fence fabric has detached and folded over. This can be resolved with
routine maintenance because it is a minor repair that ensures the stormwater control remains in
effective operating condition. Document this issue in your inspection report and communicate
this problem to the operator immediately after the inspection."
Arrow Icon
[Selecting this icon moves the user to the next area.]
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8. Site 2, Area 5
8.1. Starting View
Figure 8-1. Starting view for Site 2, Area 5.
8.2. Opening Narration
We are now standing at the foot of the stockpile. Most of the stockpile is stabilized with
temporary vegetation, but it appears the operator recently initiated stabilization of this bare
area by applying hydroseed. This is a good reminder that temporary vegetation is just that:
temporary. If left unattended and uninspected, vegetated areas can fail to establish or go bare
and require re-stabilization. As you investigate this area, keep an eye out for signs of erosion.
Select the icons in this area, and then select the arrow icon to start walking up the stockpile.
8.3. Site 2, Area 5 Interactive Icons
Figure 8-2. Composite view of interactive icons for Site 2, Area 5.
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Map Pin Icon
Figure 8-3. Site 2 Map. "You Are Here" in Area 5.
Informofion Icon (Left)
The hydroseed appears to be applied inconsistently; there is bare ground visible among streaks
of green hydroseed. Note this issue as triggering routine maintenance, which is appropriate here
because the repair is not significant, nor does it require replacement of the entire stabilization
measure.
Information Icon (Middle)
What is going on with this silt fence? You will inspect it when we walk to the next area, further up
the side of the stockpile.
Image Icon (Leftj
Figure 8-4. Small soil and gravel stockpile near the base of the large soil stockpile.
Here is a small stockpile of soil and gravel that is separate from the big stockpile. It appears to
have been here for a little while because there are signs of light rill erosion and vegetation
growing on one side. Stockpiles that will be unused for 14 or more days must be covered or
otherwise temporarily stabilized. During your site inspections, if you don't know whether a
stockpile is actively being used, you need to talk to the operator, check past inspection reports,
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and check the SWPPP. Add this finding in your inspection report as a condition triggering
corrective action because a required control has not been implemented. Present this finding to
the operator and remind them that they must initiate corrective action immediately after the
inspection.
Image Icon (Right)
Figure 8-5. View of the back of the small soil and gravel stockpile.
You need to walk all the way around a stockpile to assess the condition of all sides. This side of
the little stockpile, facing away from the construction entrance, is in the same condition as the
other side. There are no other findings about this stockpile to add to your inspection report.
Information Icon (Right)
Your colleague is wearing steel toed boots but no hard hat or construction vest at this site
because there is no active construction or heavy machinery in the area. When selecting PPE for
a site visit, make sure to follow your employer's protocols, the site's protocols, and your best
judgement.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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9. Site 2, Area 6
9.1. Starting View
Figure 9-1. Starting view for Site 2, Area 6.
9.2. Opening Narration
We have started to walk up the side of the large stockpile. This stockpile is mostly stabilized with
temporary vegetation, but there are signs of inadequate stabilization. Can you spot the issues?
Select the icons in this area to learn more, and then select the arrow icon to head to the top of
the stockpile.
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9.3. Site 2, Area 6 Interactive Icons
Figure 9-2. View of interactive icons for Site 2, Area 6.
Map Pin Icon
Figure 9-3. Site 2 Map. "You Are Here" in Area 6.
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Image Icon (Leftj
Figure 9-4. Rill erosion on the large soil stockpile.
You can see rill erosion down the entire length of the slope, leading toward the silt fence. The
red box in the image highlights the location of the rill erosion. If not addressed, this area will
continue to erode, and the rill may widen into a gully. Note this as a finding requiring routine
maintenance in your inspection report. The operator must begin the routine maintenance
immediately after the inspection. If the operator decides to add supplemental controls such as
matting or a check dam to help with the rill erosion, then a corrective action would be triggered
because a new control would be installed, and the operator would need to document the
repair in a corrective action log. Because the erosion could lead to an accumulation of
sediment on-site, you must reinspect this area during each site inspection. You must check the
condition of the stabilization and make sure the area doesn't continue to erode.
Image Icon (Middle)
Figure 9-5. View of water ponded against the silt fence at the base of the large stockpile.
There is water ponded against the silt fence, likely from the large storm that passed through the
area yesterday. The silt fence is doing its job by holding the sediment back and allowing water
to filter through. However, it seems like there may be quite a bit of sediment built up against the
silt fence. You need to check the control after the water has drained to assess if the sediment is
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accumulated to more than one half of the above-ground height of the filter fabric. If the
sediment has accumulated to that level, the operator will be required to perform routine
maintenance to remove built-up sediment.
Image Icon (Rightj
Figure 9-6. View of eroded stockpile slope upgradient of silt fence.
The area upgradient of this section of silt fence is unstabilized and eroded. The unstabilized area
is likely contributing to the turbidity of the water ponded against the silt fence, which is circled in
red. Note the unstabilized area as a finding that triggers routine maintenance in your inspection
report and present the problem to the operator. The operator could fill in and restabilize the
eroded area with hydroseed or use an alternative stabilization technique to prevent further
erosion. You can write all of the erosion findings related to the stockpile as one finding in the
inspection report.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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10. Site 2, Area 7
10.1. Starting View
Figure 10-1. Starting view for Site 2, Area 7.
10.2. Opening Narration
We have just climbed to the top of the stockpile. Whew, what a workout! The extra steps are
necessary, though, because you must inspect all stabilized areas as long as site conditions are
safe. Select the icons to assess the condition of the stabilization. After, select the arrow icon to
walk back down the stockpile.
10.3. Site 2, Area 7 Interactive Icons
Figure 10-2. Composite view of interactive icons for Site 2, Area 7.
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Mop Pin Icon
Figure J0-3. Site 2 Map. "You Are Here" in Area 7.
Image Icon (Left)
Figure 10-4. Close-up view of bare area on the large stockpile.
There are parts of the stockpile that are bare. It appears that the contractor missed some spots
during hydroseeding. Mark this as a finding that requires routine maintenance in your inspection
report and present the finding to the operator after the inspection. The operator must
immediately begin maintenance as required by the CGP. Again, routine maintenance is
appropriate here because the work does not amount to a significant repair of a control, nor
does it require the replacement of the entire stabilization measure. This finding can be added to
the previous finding about applying hydroseed more consistently across the large stockpile.
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Figure 10-5. Close-up view of hydroseeding on the large stockpile.
This area is very we!! covered with hydroseed and there are no findings to report.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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11. Site 2, AreaS
11.1. Starting View
Figure 11-1. Starting view for Site 2, Area 8.
11.2. Opening Narration
We carefully walked down and are now back at the foot of the stockpile. Let's begin to head
over to the western part of the site to inspect the final sediment trap and the site's discharge
point. Select the arrow icon to move forward.
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Figure 11-2. View of interactive icons for Site 2, Area 8.
Map Pin Icon
Figure 11-3. Site 2 Map. "You Are Here" in Area 8.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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12. Site 2, Area 9
12.1. Starting View
Figure 12-1. Starting view for Site 2, Area 9.
12.2. Opening Narration
To get to the western side of the site, let's walk along this swale and section of silt fence. After
you explore the icons in the area, select the arrow icon to move forward.
12.3. Site 2, Area 9 Interactive Icons
Figure 12-2. Composite view of interactive icons for Site 2, Area 9.
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Mop Pin Icon
Figure 12-3. Site 2 Map. "You Are Here" in Area 9.
Image Icon (Left)
Figure J2-4. Check dam at the upgradient end of the grass swale.
There is a gravel check dam here, at the upgradient end of a grass swale. This check dam
control was not included on the site map, but the operator may have decided that it was
necessary to install to prevent sediment from moving into the swale. Add this finding to your
inspection report and tell the operator to add a description of this control to their SWPPP and
include its location on the site map. Similar to how you inspected check dams at the first site,
you must ensure that the check dam spans the entire width of the area it is controlling, is well
maintained, and is not filled with sediment. This one is in good condition.
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Image Icon (Middle)
Figure J2-5. Silt fence along the upgradient side of the grass swale.
There is a length of silt fence installed along the upgradient side of a swale. The approximate
path of the swale is shown in blue. The silt fence controls stormwater flowing downhill from the
stockpile before it enters the swale. You will continue to inspect this silt fence by walking along its
length as you move toward the second sediment trap.
Information Icon
This swale conveys water toward the second sediment trap before the site's discharge point.
Image Icon (Right)
Figure 12-6. View of bare area adjacent to the construction entrance.
Here is another area that is unstabilized because the hydroseed has been applied inconsistently.
This finding can be added to the other routine maintenance finding about bare spots on the
stockpile. The operator must restabilize the bare area by reapplying hydroseed or another
stabilization measure. Similar to the other findings about bare spots, routine maintenance is
appropriate here because the work does not amount to a significant repair of a control, nor
does it require the replacement of the entire stabilization measure. Remember to communicate
this finding to the operator so that work can begin immediately to address this condition. If the
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operator decides to add supplemental controls to the bare area such as matting, then a
corrective action would be triggered because a new control would be installed.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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13. Site 2, Area 10
13.1. Starting View
Figure J 3-1. Starting view for Site 2, Area 10.
13.2. Opening Narration
We have just walked down the length of the swale and are approaching the western perimeter
of the site. Notice how the ground slopes in this area. Stormwater will flow downhill, away from
the stockpile, and toward the second sediment trap. The silt fence in this area is serving as the
downgradient sediment barrier for the stockpile. Take a moment to explore the icons in this area,
and then select the arrow icon to move to the sediment trap.
13.3. Site 2, Area 10 Interactive icons
o
Figure 13-2. Composite view of interactive icons for Site 2, Area 10.
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Map Pin Icon
Image Icon (Left)
Figure 13-4. View of collapsed silt fence along the grass swale.
Uh-oh. This section of the silt fence has collapsed. It appears to have collapsed due to sediment
accumulation and possibly the force of stormwaterflow from the stockpile. This is the only
downgradient sediment barrier for the stockpile. At a minimum, the operator must remove the
accumulated sediment and repair the damaged silt fence at this location. In addition, the
operator should consider installing additional controls to manage the expected volume and
velocity of stormwater flow. Present this finding to the operator as a corrective action because
this is a significant repair and new or replacement controls may be needed. In addition, remind
the operator that repairs must be initiated immediately.
Information Icon
This is where the final sediment trap is. You' II check this out after you finish inspecting the silt
fence.
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Image Icon (Right)
Figure / 3-5. View of detached filter fabric on the silt fence along the grass swale.
The filter fabric on this section of silt fence has detached. Note this as a finding that triggers
routine maintenance in your inspection report and tell the operator to repair the silt fence.
Routine maintenance is sufficient because the work to repair the silt fence is a minor repair to
ensure a stormwater control remains in effective operating condition. In addition, remind the
operator that repairs must be initiated immediately.
Arrow Icon
[Selecting this icon moves the user to the next area.]
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14. Site 2, Area 11
14.1. Starting View
Figure 14-J. Starting view for Site 2, Area 11.
14.2. Opening Narration
We have arrived at the second sediment trap at the site's western perimeter. This will be the last
stop in the inspection of Site 2. This sediment trap is the final control that stormwater flows
through before it is discharged from the site. Remember, you must inspect all discharge points
from a site during your inspection; this site only has this one discharge point. Select each of the
icons to inspect the sediment trap and discharge point, and then select the exit icon to end
your second site visit.
14.3. Site 2, Area 11 interactive Icons
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Mop Pin Icon
Figure 14-3. Site 2 Map. "You Are Here" in Area 11.
Informofion Icon
If they are available, it may be helpful to conduct your inspection with the operator or
designated entity who is responsible for implementing the construction stormwater controls. This
way, you can immediately point out observations and discuss necessary routine maintenance or
corrective actions.
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Image Icon (Leftj
Figure 14-4. View of the second sediment trap at the western perimeter of the site.
The overgrown vegetation makes it difficult to assess the condition of the sediment trap's
embankments and outlet. Remember to inspect the entire perimeter of the sediment trap as
long as site conditions are safe. This sediment trap is supposed to have a riprap outlet similar to
the first sediment trap you inspected. You can see some silt fence from this view, but not the
riprap outlet, at least not from this vantage point. You may need to walk around to the
downstream side of the sediment trap to assess the condition of the outlet. Although the
embankment of the sediment trap appears to be well stabilized, note in your inspection report
that the operator needs to trim the vegetation to ensure the sediment trap is in effective
operating condition. Document this finding as requiring routine maintenance and discuss it with
the operator.
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Image Icon (Right)
Figure 14-5. View of the downstream side of the sediment trap's outlet and the concrete channel
downgradienf of the outlet.
When you inspect a site's discharge point, you must check for signs of erosion and sediment
deposition. This image shows the downstream side of the sediment trap's riprap outlet, where
stormwater flows into a concrete channel. Accumulated sediment is visible in the concrete
channel and needs to be removed so it does not discharge into any downstream waterbodies
or storm systems. Document this finding in your inspection report as triggering routine
maintenance. This, along with the other issues you've noted during your inspection, shows that
despite the site being inactive and mostly stabilized, there is still sediment moving off-site. You
shouldn't see this much sediment at this discharge point on your future inspections if the
operator completes the various routine maintenance and corrective action items identified
across the site during this inspection. If the necessary routine maintenance and corrective
actions are complete elsewhere on the site but you continue to observe sediment at this
location during future inspections, the operator may need to consider improving the riprap
outlet for this sediment trap. Improvements to the outlet could include adding smaller stone or
filter fabric to the riprap to help filter out sediment. Improvements could also include ensuring the
riprap is not clogged with sediment, which could cause sediment-laden water to overtop the
outlet instead of filtering through it.
Exit Icon
[Selecting this icon moves the user to the next area.]
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15. Screen 15
15.1. Visual Element
0
Reminders: After a Site Inspection...
Communicate your findings and suggested fixes to the
operator immediately.
The operator must initiate routine maintenance and corrective
actions immediately.
The operator must complete the work by the deadlines
specified in the CGP.
Ś Routine maintenance: complete by the close of the next
business day.
Ś Corrective actions that do not require a new or
replacement control or significant repair: complete by the
close of the next business day.
Ś Corrective actions that do require a new or replacement
control or a significant repair: complete within seven
calendar days.
EPA's Inspection Report Template
*>EPA
United Stales
Environmental Protection
Agency
0
15.2. Narration
After a site inspection, in addition to completing an inspection report, you need to
communicate your findings and suggested fixes to the operator so they can initiate routine
maintenance and corrective actions immediately and complete the work by the deadlines
specified in the CGP. Routine maintenance must be completed by the operator by the close of
the next business day. Corrective actions that do not require a new or replacement control or
significant repair must also be completed by the operator by the close of the next business day.
Corrective actions that require a new or replacement control or a significant repair must be
completed by the operator within seven calendar days.
To conclude the inspection, let's practice filling out an inspection report with your findings.
Before continuing to the next screen, select the button on the screen to navigate to EPA's
webpage for a copy of EPA's Inspection Report Template.
15.3. Links
EPA's Inspection Report Template
https://www.epa.qov/npdes/construction-qeneral-permit-resources-tools-and-
templates#inspection
Photo by Christina Hawkins on Unsplash
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16. Screen 16
16.1. Visual Element
Completing an Inspection Report
- QUICK TIP .
Condition and Effectiveness of Erosion and Sediment (E&S) Controls (CGP Part 2.2)
Type and Location of
E&S Control
Conditions
Requiring Routine
Maintenance?
If "Yes* How Many Times
{Including This Occurrence) Has
This Condition Been Identified?
Conditions Requiring
Corrective Action?
A
J i Ś-
Description of Conditions Observed5-
1. Wash rack at the site
entrance.
2. Outlet of sediment
trap by the site entrance.
3. Silt fence at the
sediment trap by the site
entrance
4. Unstabilized small
stockpile.
~ Yes El No
Ł3 Yes ~ No
Yes ~ No
"21 Yes ~ No
Š
~ Yes 0 No
~ Yes -0 No
~ Yes 0 No
0 Yes C] No
1. The wash rack is overgrown with vegetation. However,
because the construction site is inactive, the wash rack is
not being used as part of the stabilized site entrance. The
operator must update the SWPPP and site map within
seven days.
2. Heavy vegetation is growing at the stormwater trap. Trim
the vegetation by the close of the next business day. If
infeasible, document why, and complete by no later than 7
days following this inspection.
3. Filter fabric has detached from the sift fence. Reattach
the filter fabric by the close of the next business day. If
infeasible, document why, and complete by no later than 7
days following this inspection.
4. The stockpile is showing signs of erosion and appears to
have been unused for more than 14 days. Cover or
temporarily stabilize the stockpile within seven calendar
days.
oEPA
United States
Environmental Protection
Agency
6.2. Narration
16 of 32
On this screen, the findings for Site 2 are presented in a modified version of EPA's site inspection
report template. Let's practice filling it out together. First, the wash rack in the construction
entrance is overgrown with vegetation. However, because the site is inactive, the wash rack is
not currently being used and this finding does not need to trigger routine maintenance or
corrective action. The operator must return the control to functionality if the site resumes regular
construction activity. Even though it does not trigger routine maintenance or corrective action,
you should still include the observation in your inspection report to document your assessment of
all controls on-site. Remember to tell the operator that they must update the SWPPP and site
map to reflect the status of the wash rack within seven days.
Next, routine maintenance is needed to remove the excessive vegetative growth at the outlet
of the sediment trap. Routine maintenance is also needed to reattach the filter fabric for the
super silt fence at end of the sediment trap's swale.
Fourth, the small stockpile is showing signs of erosion and appears to have been unused for more
than 14 days. Let's assume that after checking previous inspection reports, you learn that this
finding has been made during two previous inspections. Because of this, this finding must trigger
a corrective action.
Keep in mind, you can document in the inspection report if the reoccurrence of the same
problem should still be addressed as a routine maintenance fix instead of corrective action. You
can also document in your inspection report if and why specific routine maintenance activities
cannot be completed by the close of the next business day.
43
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16.3. Links
Quick Tips Icon
The CGP does not require you to state the timeframe for maintenance or corrective actions
your findings; however, it's a good practice to remind the operator of their responsibilities.
-------
17. Screen 17
17.1. Visual Element
Completing an Inspection Report
Condition and Effectiveness of Erosion and Sediment (E&S) Controls (CGP Part 2.2)
Type and Location of
E&S Control
Conditions
Requiring Routine
Maintenance?
If "Yes* How Many Times
(Including This Occurrence) Has
This Condition Been Identified?
Conditions
Requiring Corrective
Action?
Description of Conditions Observed
5. Stockpile stabilization
6. Hydroseed in various
areas on the stockpile
7. Silt fence by the large
stockpile
QVes ~ No
0"Yes ~ No
~ Yes 3 No
1
1
~ Yes {/J No
~ Yes 0 No
~ Yes 0 No
5. There is rill erosion down the side of the stockpile. Fill in
and restabilize the eroded area with hydroseed or another
stabilization technique by the close of the next business
day. If infeasibte, document why, and complete by no later
than 7 days following this inspection.
6. Hydroseed was applied inconsistently across the
stockpile. Stabilize the bare areas (e.g., reapply hydroseed
consistently) by the dose of the next business day. If
infeasible, document why, and complete by no later than 7
days following this inspection.
7. There is water ponded against the silt fence. Inspect this
control again after the water has drained to assess if the
sediment has accumulated to more than one hatf of the
above-ground height of the filter fabric.
vvEPA
United States
Environmental Protection
Agency
17 of 32
17.2. Narration
Moving on, the next three findings are related to the large stockpile. The rill erosion along the
side of the large stockpile needs to be filled in and restabilized. There are also several spots
along the slope and at the top of the stockpile that are bare and need to be stabilized. Both of
these findings trigger routine maintenance. To effectively communicate with the operator about
these two findings, you should walk this area of the site again with the operator and point out
the specific eroded and bare areas that need to be fixed.
In addition, you should include a finding in your inspection report about the ponded turbid
water against the silt fence downgradient of the large stockpile. Although this finding does not
trigger routine maintenance or corrective action, it is a good practice to include it in your
inspection report to document that you have assessed all stormwafer controls on-site. You
should plan to inspect this control again, after the water has drained, to assess the condition of
the silt fence.
45
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18. Screen 18
18.1. Visual Element
Completing an Inspection Report
Condition and Effectiveness of Erosion and Sediment (E&S) Controls (CGP Part 2.2)
Type and Location of
E&S Control
Conditions
Requiring Routine
Maintenance?
ff "Yes" How Many Times
(Including This Occurrence) Has
This Condition Been Identified?
Conditions
Requiring Corrective
Action?
Description of Conditions Observed
8. Check dam by the
grass swale
9. Silt fence by sediment
trap #2
10. Silt fence by
sediment trap #2
11. Discharge point from
sediment trap #2
i
I~l Yes *0 No
I I Yes 0 No
0 Yes 0 No
U\ Yes 0 No
1
1
1
~ Yes >0 No
"0 Yes 0 No
0 Yes >0 No
0 Yes >0 No
8. The check dam is riot included on the site map. The
operator must update the SWPPP, including the site map,
within seven days.
9. The section of sift fence down gradient of the stockpile
has collapsed. Evaluate the cause of the problem, remove
the accumulated sediment, and reinstall the silt fence
within seven calendar days. Consider installing additional
stormwater controls to prevent a recurring finding.
10. Near the second sediment trap, the silt fence's fitter
fabric has detached. Repair the silt fence by the close of
the next business day. If infeasible, document why, and
complete by no later than 7 days following this inspection.
11. Sediment was observed at the discharge point.
Remove the sediment from the discharge point by the
close of the next business day. If infeasible, document
why, and complete by no later than 7 days following this
inspection. Continue to monitor after routine k
maintenance is completed to confirm that sediment ' \
is not discharged off-site. | ( y
oEPA
United Stales lo Of JZ
Environmental Protection
Agency
18.2. Narration
Here are the rest of the findings for Site 2. First, you should document that the check dam by the
grass swale is not in the SWPPP and site map. Again, it is good to include notes about all of the
construction stormwater controls that you assessed, even if the finding does not trigger routine
maintenance or corrective action. To address this finding, the operator must update the SWPPP
and site map within seven calendar days.
Next, the section of silt fence that has collapsed by the second sediment trap triggers a
corrective action because it requires a significant repair. The operator should remove the
accumulated sediment and repair the damaged section of silt fence. In addition, the operator
should consider if additional construction stormwater controls are needed in this area to prevent
the silt fence from collapsing again. Routine maintenance is also needed to reattach the filter
fabric on a section of the silt fence by the second sediment trap.
Finally, although you did not observe a discharge occurring during your inspection, the sediment
accumulation that you observed at the site's discharge point indicates that a previous
discharge may have occurred. You need to ask the operator to remove the accumulated
sediment from the discharge point by the close of the next business day.
46
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19. Screen 19
19.1. Visual Element
Updating a Corrective Action Log: Introduction
The operator is responsible for completing entries in a
corrective action log.
Each entry consists of;
- Documenting the corrective action condition (Section B of
EPA's template)
- Describing the actions taken to address the condition
(Section C of EPA's template)
The operator must complete a separate entry for each corrective
action that is identified.
0
&EPA
Unijed States
Environmental Protection
Agency
19 of 32
19.2. Narration
Now that you've documented which findings trigger corrective action, let's look at how a
corrective action log is filled out.
The operator is ultimately responsible for entering a complete entry into the corrective action
log. Each entry into the corrective action log consists of documenting the corrective action
condition, which is included as Section B of EPA's template, and describing the action taken to
address the condition and modify the SWPPP if necessary, which is included as Section C of the
template.
Keep in mind, the operator must complete a separate corrective action log entry for each
individual corrective action that is identified.
47
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20. Screen 20
20.1. Visual Element
EPA's Corrective Action Log Template
United States
Environmental Protection
Agency
Updating a Corrective Action Log
Section B: Details of the Problem (CGP Part 5.4.1 .a)
Complete this section within 24 hours of discovering the condition that triggered corrective action
Date problem was first identified: 7/7/2022
Time problem was first identified: 2:30pm
What site condition triggered this corrective action? (Check the box that applies. See a description of each triggering
condition (1 through 6).)
01 ~ 2 ~ 3 ~ 4 Qsa Qsb ~ 6
Specific location where problem Identified: Silt fence by sediment trap #2
Provide a description of the specific condition that triggered the need for corrective action and the cause (if
identifiable):
The section of silt fence down gradient of the stockpile has collapsed. The accumulated sediment needs to be
removed, and the collapsed silt fence needs to be reinstalled or replaced. Possible causes for the collapse include
sediment accumulation and possibly the force of stormwater flow from the stockpile.
20.2. Narration
This screen presents a modified portion of EPA's corrective action log template. Select the
button on the screen to navigate to EPA's webpage for a copy of EPA's template. The CGP
requires that Section B of the corrective action log, which is shown on this screen, must be
completed within 24 hours of discovering the condition that triggered the corrective action.
Let's use the finding of the collapsed silt fence by sediment trap number 2 as an example. In this
case, a corrective action was triggered because a new or replacement control is needed. On
EPA's template, this situation corresponds to condition number 1. Select the link on the screen to
see a description of each triggering condition, 1 through 6. In addition to documenting the
specific location where the problem was identified, the operator must also provide a description
of the condition that triggered the corrective action, and the cause, if it can be identified.
20.3. Links
EPA's Corrective Action Log Template
https://www.epa.aov/npdes/construction-aeneral-permit-resources-tools-and-
templates#inspection
See a description of each triggering condition (1 through 6):
1. A stormwater control needs a significant repair or a new or replacement control is
needed, or, in accordance with Part 2.1,4c, you find it necessary to repeatedly (i.e.,
three or more times) conduct the same routine maintenance fix to the same control at
the same location (unless you document in your inspection report under Part 4.7.1 c that
48
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the specific reoccurrence of this same problem should still be addressed as a routine
maintenance fix under Part 2.1.4).
2. A stormwater control necessary to comply with the requirements of this permit was never
installed, or was installed incorrectly.
3. Your discharges are not meeting applicable water quality standards.
4. A prohibited discharge has occurred (see Part 1.3).
5. During discharge from site dewatering activities:
a. The weekly average of your turbidity monitoring results exceeds the 50 NTU
benchmark (or alternate benchmark if approved by EPA pursuant to Part 3.3.2b); or
b. You observe or you are informed by EPA, State, or local authorities of the presence of
any of the following at the point of discharge to a receiving water flowing through or
immediately adjacent to your site and/or to constructed or natural site drainage
features or storm drain inlets:
Sediment plume
Suspended solids
Unusual color
Presence of odor
Decreased clarity
Presence of foam
Visible sheen on the water surface or visible oily deposits on the bottom or
shoreline of the receiving water
6. EPA requires corrective action as a result of permit violations found during an inspection
carried out under Part 4.8.
49
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21. Screen 21
21.1. Visual Element
4 i\ K
Updating a Corrective Action Log
Section C: Corrective Action Completion (CGP Part 5.4.1.b)
Complete this section within 24 hours after completing the corrective action.
For site condition # 1, 2, 3, 4, or 6 (those not related to a dewatering discharge) confirm that you met the
following deadlines (CGP Part 5.2.1):
& Immediately took all reasonable steps to address the condition, including cleaning up any contaminated surfaces so
the material will not discharge n subsequent storm events. AND
~ Completed corrective action by the close of the next business day, unless a new or replacement control, or
significant repair, was required. OR
Of Completed corrective action within seven (7) calendar days from the time of discovery because a new or
replacement control, or significant repair, was necessary to complete the installation of the new or modified control or
complete the repair. OR
~ It was infeasible to complete the installation or repair within 7 calendar days from the time of discovery. Provide the
following additional information:
Explain why 7 calendar days was infeasible to complete the installation or repair:
<3
Provide your schedule for installing the stormwater control and making it operational as soon as feasible after the 7 calendar da1
vvEPA
United States
Environmental Protection
Agency
21 of 32
21.2. Narration
Next, the template requires that the operator record within 24 hours of completing this corrective
action that they have met the CGP deadlines for starling and finishing work to address the
conditions triggering the corrective action. Section C documents the actions the operator took
to address the issue, in the example of the collapsed silt fence by sediment trap number 2, first,
let's assume that the operator immediately took all reasonable steps to address the condition,
such as removing the accumulated sediment and assessing the condition of the silt fence. Then,
the operator determined that the necessary corrective actions include replacing the collapsed
section of silt fence and installing an additional check dam upgradient of the silt fence to
control the speed of stormwater flow from the stockpile and prevent the silt fence from
collapsing again. Because these corrective actions require installing a new or replacement
control, the operator must complete the work within seven calendar days unless it is infeasible to
do so. For the sake of this example, let's assume the operator completed the work within the
seven-day timeframe. In this case, the operator would check the third box to confirm they met
the required deadline. If it had been infeasible for the operator to replace the silt fence within
seven calendar days, they would need to check the fourth box, and provide an explanation for
why it was infeasible and their schedule for replacing the silt fence.
50
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22. Screen 22
22.1. Visual Element
Updating a Corrective Action Log
Section C: Corrective Action Completion (CGP Part 5.4.1.b)
Complete this section within 24 hours after completing the corrective action.
Describe any modification(s) made as part of corrective
action: (insert additional rows below if applicable)
Date of
Completion:
SWPPP update
necessary?
If yes, date
SWPPP was
updated:
1. Replaced the collapsed section of silt fence.
6/15/2022
] Yes [s/j No
2. Installed a new check dam upgradient of the silt fence.
6/15/2022
\ A Yes | | No
6/16/2022
22.2. Narration
As part of Section C of the corrective action log template, the operator also needs to describe
any modifications they made to address the problem and document the dates when they
completed the work. Additionally, the operator needs to indicate whether the modifications
require a SWPPP update. Replacing the collapsed silt fence does not require a SWPPP update
because the silt fence in this area of the site was already planned for in the SWPPP and
documented on the site map. However, the operator would need to update the SWPPP to
describe the new check dam and add its location to the site map. The operator must document
the date of any SWPPP updates.
EPA's corrective action log template contains other sections, such as a section to cover
corrective actions triggered by dewatering activities and a signature and certification section.
We will not go over those sections in this module, so be sure to review EPA's corrective action log
template and Part 5.1 of the CGP for more information. We will also not go over Section D of the
template, which includes the signature and certification by the operator. Just be aware that an
entry into the corrective action log is only considered complete after it has been signed and
certified.
Now that you understand how an operator is required to update a corrective action log, you will
know what to look for if you are reviewing one as part of a site inspection.
51
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23. Screen 23
23.1. Visual Element
/
w
Module 5 Summary
In this module, you learned how to do the following:
Prepare for a site inspection.
Apply what you've learned to evaluate
construction stormwater controls and identify
deficiencies.
Document a site inspection
Communicate findings to the site operator and
perform post-inspection follow-up to verify
~C' ~ *f'
bet j *
*
c Mil
k5E ŤŚ Ś%". -
r ,i S ^ " f
iŁ.
nT
completion of corrective actions.
Time to take the knowledge check! Then, exit this module to advance to the final exam.
0
I
=>
oEPA
United Slates
Environmental Protection
Agency
23 of 32
23.2. Narration
Congratulations, you've finished Module 5! Now that you've learned about your responsibilities
for conducting a CGP site inspection, advance to the next screen to take the knowledge
check.
The knowledge check serves only as a review of your understanding of the material. You have
unlimited chances to complete the knowledge check successfully. Once you've completed the
knowledge check, exit the module and advance to the final exam, which will test your
understanding of content presented in all five modules.
52
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oEPA
United Stales
Environmental Protection
Agency
24 of 32
24. Screen 24
24.1. Visual Element
Time for a
Knowledge Check!
24.2. Narration
This knowledge check and others we provide will help you when taking the final exam. If you're
ready, go to the next screen to begin!
53
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25. Screen 25
25.1. Knowledge Check Question
After completing each site inspection, you must complete your inspection report:
0 A) Within fourteen calendar days
O B) Within 24 hours
0 C) Before the next storm event of 0.25 inches or more
0 D) Not necessary, just verbally inform the operator of your findings
Submit
&EPA
United States
Environmental Protection
Agency
25.2. Knowledge Check Explanation
Correct, the answer is B. This requirement is specified by CGP Part 4.7.1.
54
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26. Screen 26
26.1. Knowledge Check Question
True or false. You must inspect all storm drain inlets that are within the permitted boundary per the site map,
including those outside of the active construction area.
O A) Tme
O B) False
Submit
*>EPA
United Stales
Environmental Protection
Agency
26.2. Knowledge Check Explanation
Correct, the answer is True. You must inspect all stormwater controls within the permitted area.
55
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27. Screen 27
Knowledge Check Question
HHH
Check all that apply. Which of the following documents should you review before an inspection?
] A) The Notice of Intent of the neighboring construction site(s)
] B) Past inspection reports
~ C) The SWPPP
| D) The corrective action log
Submit
oEPA
United Stales
Environmental Protection
Agency
27 of 32
27.2. Knowledge Check Explanation
Correct, the answers are B, C, and D. You are only required to inspect the permitted area, so the
NOI for the neighboring construction site is not relevant.
56
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28. Screen 28
28.1. Knowledge Check Question
When must the operator complete routine maintenance identified as a result of a site inspection?
o A) Within the week
0 B) By the end of the next routine inspection
o C) By the close of the next business day
O D) Before the end of the next storm
Submit
SEPA
United States
Environmental Protection
Agency
28 of 32
28.2. Knowledge Check Explanation
Correct, the answer is C. The operator must immediately initiate the needed maintenance work and
complete the work by the close of the next business day. This requirement is specified in CGP Part 2.1.4
b. Note that if it is infeasible for the operator to complete the routine maintenance work by the close of
the next business day, the permit allows the deadline to be extended to 7 calendar days from the time
of discovery of the condition as long as the reason for why the work could not be completed by the close
of the next business day is documented.
57
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29. Screen 29
Knowledge Check Question
During a site inspection you discover that site conditions have changed from what is represented in the
SWPPP site map. What is the operator's deadline for updating the site map?
0 A) Within seven calendar days of the inspection
O B) Right before the next inspection performed by the permitting authority
o C) The original site map does not need to be modified
o D) Within the permit term
Submit
oEPA
United Stales
Environmental Protection
Agency
29.2. Knowledge Check Explanation
Correct, the answer is A. This requirement is specified by CGP Part 7.4.1.
58
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30. Screen 30
30.1. Knowledge Check Question
Check all that apply. What are some best practices for communicating your findings with the operator after a
site inspection or dewatering inspection?
|^| A) Share a copy of your inspection report with the operator.
B) Leave your inspection report in the SWPPP and hope the operator sees it.
r^| C) Wait until the next inspection to communicate your findings to the operator.
| | D) Communicate your finding to the operator immediately.
| ] E) Remind the operator of the timelines for completing routine maintenance and corrective actions.
| ] F) Discuss your findings with the operator to see if they have additional information that may change your
findings.
Submit
SEPA
United States
Environmental Protection
Agency
30 of 32
30.2. Knowledge Check Explanation
Correct, the answers are A, D, E, and F. The answers shown here are best practices, and not
specifically required by the CGP. Although you are not required to verbally discuss your findings
with the operator or remind them of the timelines for completing work, it is important to make
the operator aware of your findings immediately after your inspection so they can complete the
work by the CGP-required deadlines.
59
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31. Screen 31
Knowledge Check Question
What is the CGP deadline for an operator to complete a corrective action that does not require a new or
replacement control, or significant repair?
0 A) Immediately.
O B) By the close of the same business day,
O C) By the close of the next business day.
0 D) Within seven calendar days.
Submit
oEPA
United Stales
Environmental Protection
Agency
31 of 32
31.2. Knowledge Check Explanation
Correct, the answer is C. The deadlines for completing corrective actions are specified in Part
5.2 of the CGP.
60
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32. Screen 32
32.1. Visual Element
Congratulations on completing Module 5!
Please close this module and navigate to the Final Exam to complete the CGP Inspector Training
course.
J
L *=>
Ś-
xvEPA
United Stales
Environmental Protection
Agency
32 of 32
32.2. Narration
[no narration]
61
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